Controlled transmission of data in a data transmission system

Abstract

This disclosure relates to controlled transmission of data in a data transmission system. Data from data interface elements may be transmitted in a controlled manner during the guard intervals or cyclic expansions of received RF signals. The received RF signals may be initially analyzed by a receiver to gather its characteristics. Based on the characteristics, the data interface elements are instructed to transfer the data during the guard intervals of the incoming RF signals.

What is claimed is: 
     
       1. A method, comprising:
 receiving a baseband signal that includes symbols and guard intervals; 
 identifying characteristics associated with the baseband signal, symbols, and guard intervals, wherein start points and end points for symbols are identified; and 
 enabling the data transfer during a time interval of a guard interval. 
 
     
     
       2. The method of  claim 1 , wherein the receiving includes converting the baseband signal from a received analog RF signal. 
     
     
       3. The method of  claim 1 , wherein the identifying includes identifying lengths of the symbols and the guard intervals. 
     
     
       4. The method of  claim 1 , wherein the enabling includes instructing data transfer during a time length of the guard interval. 
     
     
       5. The method of  claim 1 , further comprising marking a time length of the guard intervals. 
     
     
       6. A data receiver comprising:
 a radio frequency (RF) device to receive analog RF signals; 
 one or more Analog to Digital Converters (ADCs) to convert the analog RF signals to digital baseband signals; 
 a control machine to identify characteristics of symbols and cyclic expansions in the digital baseband signals; and 
 a data interface to transmit the symbols in the digital baseband signals based on the characteristics identified by the control machine. 
 
     
     
       7. The data receiver of  claim 6 , wherein the RF device receives the analog RF signals in the form of OFDM signals, and the cyclic expansions are guard intervals in the OFDM signals. 
     
     
       8. The data receiver of  claim 6 , wherein the control machine is to identify the following characteristics:
 starting points and time length of the symbols and 
 cyclic expansions. 
 
     
     
       9. The data receiver of  claim 6 , wherein the control machine includes a guard tracking module to identify characteristics of the baseband signals, and a timer to control the data interface in transmission of the demodulated signals. 
     
     
       10. The data receiver of  claim 9 , wherein the guard tracking module is to generate start signals of the symbols and the cyclic expansions, wherein the start signals are to be passed to the data interface. 
     
     
       11. The data receiver of  claim 9 , wherein the timer is to control the data interface to transmit the symbols during a marked permissible time. 
     
     
       12. The data receiver of  claim 6 , further comprising a digital signal processor to receive and process the symbols. 
     
     
       13. An apparatus comprising:
 a radio frequency (RF) device to receive RF signals and send baseband signals; 
 a control machine to receive demodulated signals; 
 a data interface to receive the demodulated signals and control information from the control machine, and to initiate transmission of the demodulated signals; and 
 a guard tracking module to identify characteristics of the baseband signals, and a timer to control the data interface in transmission of the demodulated signals. 
 
     
     
       14. The apparatus of  claim 13 , further comprising a demodulator to identify lengths of symbols and guard intervals in the baseband signals. 
     
     
       15. The apparatus of  claim 13 , further comprising a demodulator to remove guard intervals and collect symbols in the baseband signals. 
     
     
       16. The apparatus of  claim 13 , wherein the control machine provides start and end marks of guard intervals to the data interface to transmit the demodulated signals. 
     
     
       17. The apparatus of  claim 13 , wherein the data interface receives instruction from the control machine to transmit the demodulated signals. 
     
     
       18. The apparatus of  claim 13 , further comprising an Analog to Digital Converter that convert the baseband signals, if the baseband signals are analog, into digital baseband signals, and passes the digital baseband signals.